Molar sound velocity in solutions of metal organic compounds

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Study of temperature variation of ultrasonic velocity adiabatic compressibility - Part II

A theoretical relation between molecular weight and temperature coefficient of ultrasonic velocity and boiling temperature has been derived following the theoretical treatment given by Kishimoto and Nomoto. This theoretical relation has been tested from the available data in organic liquids, liquified gases and molten metals and also the data obtained by the authors. It has been shown that Lagemann's empirical relation is an approximation of this new relation. The deviations in some cases like alcohols, molten metals and liquified gases is attributed to molecular association in liquids and it is shown that better agreement will be obtained after applying a correction by using the association factor determined by Ramsay and Shield's equation. A new relation between ultrasonic velocity and latent heat of vaporisation has also been obtained and confirmed by the experimental data for organic liquids, liquified gases and molten metals. This relation has also been obtained theoretically from thermodynamics

A relation between ultra-sonic velocity and latent heat of vaporization

Several attempts have been made by different investigators to find the relation between ultra-sonic velocity in liquids and the physical properties. One such relation has been obtained by Rao empirically. Recently, Kishimoto and Nomoto have obtained a relation between temperature coefficient of ultra-sonic velocity and boiling point of a liquid. In this communication we present a new relation between ultra-sonic velocity and latent heat of vaporization

Study of temperature variation of ultrasonic velocity and adiabatic compressibility in some liquids - Part I

Temperature variation of ultrasonic velocity and density is studied in some organic liquids, low melting point organic solids in melt state, and corrosive inorganic liquids. It is found that in all the cases the ultrasonic velocity decreased linearly with increase of temperature. The temperature independence of Rao's molar sound velocity was studied for the first time in corrosive inorganic liquids and is established. The new relations put forward Kishimoto and Nomoto for temperature coefficients of velocity, density and adiabatic compressibility in terms of boiling point are examined and confirmed. The relation put forward Lagemann M½. ΔV/ΔT was also examined

Molar sound velocity in molten hydrated salts

From a systematic study of the temperature-variation of ultrasonic velocity and density in organic liquids, Rao has found that the ratio of the temperature coefficients of the ultrasonic velocity and density is nearly equal to 3 for most organic liquids. From this result he has deduced the relation: R = M/ρ (V)1/3 where M is the molecular weight, ρ is the density, V is the ultrasonic velocity and R, known as molar sound velocity, is characteristic of the liquid and is independent of temperature. Although Rao established this relation in the case of organic liquids, later workers have extended it to several inorganic liquids and have shown that R is independent of temperature. In the present communication, results are given of the variation with temperature of ultrasonic velocity in five molten hydrated salts

Investigation of molar sound velocity in melts and solutions

Ultrasonic velocity studies are carried out in organic solutions of six low melting point organic solids and the melts of these solids. The constancy of R is established over a wide range of temperature in the melt state. It is found that R is strictly linear with concentration expressed in mole fraction of the solute and the average extrapolated value for 100% concentration of the solute is compared with that from the melt state and also with the theoretical computed values due to Rao's atomic increment method and Lagemann's bond increment method

Molar sound velocity in inorganic acids

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